﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace BS
{
    public partial class 时间日期 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            //C#根据当前时间确定日期范围（本周、本月、本季度、本年度及常见日期方法荟萃
            DateTime dt = DateTime.Now;  //当前时间

            DateTime startWeek = dt.AddDays(1 - Convert.ToInt32(dt.DayOfWeek.ToString("d")));  //本周周一
            DateTime endWeek = startWeek.AddDays(6);  //本周周日

            DateTime startMonth = dt.AddDays(1 - dt.Day);  //本月月初
            DateTime endMonth = startMonth.AddMonths(1).AddDays(-1);  //本月月末
            //DateTime endMonth = startMonth.AddDays((dt.AddMonths(1) - dt).Days - 1);  //本月月末

            DateTime startQuarter = dt.AddMonths(0 - (dt.Month - 1) % 3).AddDays(1 - dt.Day);  //本季度初
            DateTime endQuarter = startQuarter.AddMonths(3).AddDays(-1);  //本季度末

            DateTime startYear = new DateTime(dt.Year, 1, 1);  //本年年初
            DateTime endYear = new DateTime(dt.Year, 12, 31);  //本年年末
            //昨天、明天、上周、上月、上季度、上年度等等，只要AddDays()、AddMonths()、AddYears()这几种方法组合


            //一.如何获得当月有多少天
            int m = System.DateTime.DaysInMonth(System.DateTime.Now.Year, System.DateTime.Now.Month);
        }
        //二.日期型格式处理通用方法
        //1.在webconfig中配置如下
        //<add key="ShortDatePattern" value="MM-dd-yyyy" />
        //<add key="LongDatePattern" value="dddd-MMMM dd-yyyy" />
        //<add key="ShortTimePattern" value="hh:mm tt" />
        //<add key="LongTimePattern" value="hh:mm tt" />
        //2.在global.asax中
        protected void Application_BeginRequest(Object sender, EventArgs e)
        {
            //Thread currentThread = Thread.CurrentThread;
            //CultureInfo cul = currentThread.CurrentCulture.Clone() as CultureInfo;
            //cul.DateTimeFormat.ShortDatePattern= BLLFacade.Common.GetShortDatePattern();
            //cul.DateTimeFormat.LongDatePattern= BLLFacade.Common.GetLongDatePattern();
            //cul.DateTimeFormat.ShortTimePattern= BLLFacade.Common.GetShortTimePattern();
            //cul.DateTimeFormat.LongTimePattern= BLLFacade.Common.GetLongTimePattern();
            //currentThread.CurrentCulture = cul;
        }
        //3.在业务逻辑层中
        public static string GetShortDatePattern()
        {
            return System.Configuration.ConfigurationSettings.AppSettings["ShortDatePattern"];
        }

        public static string GetLongDatePattern()
        {
            return System.Configuration.ConfigurationSettings.AppSettings["LongDatePattern"];
        }

        public static string GetShortTimePattern()
        {
            return System.Configuration.ConfigurationSettings.AppSettings["ShortTimePattern"];
        }

        public static string GetLongTimePattern()
        {
            return System.Configuration.ConfigurationSettings.AppSettings["LongTimePattern"];
        }
        //4.然后在其他地方正常调用就可以了，如果需要修改格式只需要修改webconfig中的，且可以保证整个系统中的所有格式都是一致的 
        //三.在asp.net中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等
        //在asp.net中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等
        #region 在asp.net中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等
        //        调用
        //        DateTime a=Convert.ToDateTime("2005-09-03 20:15");
        //        DateTime b=Convert.ToDateTime("2005-09-04 09:09 ");
        //        double d=Bll.Common.DateDiff(Bll.Common.EnumDateCompare.day,a,b);
        //        Response.Write(d.ToString("f0"));//四舍五入
        public enum EnumDateCompare
        {
            year = 1,
            month = 2,
            day = 3,
            hour = 4,
            minute = 5,
            second = 6
        }
        public static double DateDiff(EnumDateCompare howtocompare, System.DateTime startDate, System.DateTime endDate)
        {
            double diff = 0;
            System.TimeSpan TS = new System.TimeSpan(endDate.Ticks - startDate.Ticks);

            switch (howtocompare)
            {
                case EnumDateCompare.year:
                    diff = Convert.ToDouble(TS.TotalDays / 365);
                    break;
                case EnumDateCompare.month:
                    diff = Convert.ToDouble((TS.TotalDays / 365) * 12);
                    break;
                case EnumDateCompare.day:
                    diff = Convert.ToDouble(TS.TotalDays);
                    break;
                case EnumDateCompare.hour:
                    diff = Convert.ToDouble(TS.TotalHours);
                    break;
                case EnumDateCompare.minute:
                    diff = Convert.ToDouble(TS.TotalMinutes);
                    break;
                case EnumDateCompare.second:
                    diff = Convert.ToDouble(TS.TotalSeconds);
                    break;
            }
            return diff;
        }

        #endregion
        //四.获取某月的实际工作日(即不包括周六日)
        //调用
        //int days =getDays(System.DateTime.Now));
        private int getDays(System.DateTime date1)
        {
            int m = System.DateTime.DaysInMonth(date1.Year, date1.Month);
            int mm = 0;
            for (int i = 1; i <= m; i++)
            {
                System.DateTime date = Convert.ToDateTime(date1.Year + "-" + date1.Month + "-" + i);
                switch (date.DayOfWeek)
                {
                    case System.DayOfWeek.Monday:
                    case System.DayOfWeek.Thursday:
                    case System.DayOfWeek.Tuesday:
                    case System.DayOfWeek.Wednesday:
                    case System.DayOfWeek.Friday:
                        mm = mm + 1;
                        break;

                }
            }
            return mm;
        }
        //五.获得任意两日期之间的有效工作日(不包括周六日) 获得任意两日期之间的有效工作日(不包括周六日)#region 获得任意两日期之间的有效工作日(不包括周六日)
        //调用
        //DateTime date1=Convert.ToDateTime("2005-10-20");
        //DateTime date2=Convert.ToDateTime("2005-11-01");
        //int days =getDays(date1,date2);
        private int getDays(System.DateTime date1, System.DateTime date2)
        {
            string m = DateDiff(EnumDateCompare.day, date1, date2).ToString("f0");

            int mm = 0;
            for (int i = 0; i <= Convert.ToInt32(m); i++)
            {
                System.DateTime date = Convert.ToDateTime(date1.AddDays(i));
                switch (date.DayOfWeek)
                {
                    case System.DayOfWeek.Monday:
                    case System.DayOfWeek.Thursday:
                    case System.DayOfWeek.Tuesday:
                    case System.DayOfWeek.Wednesday:
                    case System.DayOfWeek.Friday:
                        mm = mm + 1;
                        break;
                }
            }
            return mm;
        }
        //六.格式输出
        //格式输出
        #region 格式输出
        private void Page_Load2(object sender, System.EventArgs e)
        {
            System.Globalization.DateTimeFormatInfo myDTFI = new System.Globalization.CultureInfo("en-US", false).DateTimeFormat;//中国用zh-cn
            DateTime myDT = System.DateTime.Now;

            Response.Write(myDT.ToString("f", myDTFI));
            /**/
            /**/
            /**/
            /*
        This code produces the following output.

        FORMAT  en-US EXAMPLE
        CHAR    VALUE OF ASSOCIATED PROPERTY, IF ANY

          d     1/3/2002
                M/d/yyyy (ShortDatePattern)

          D     Thursday, January 03, 2002
                dddd, MMMM dd, yyyy (LongDatePattern)

          f     Thursday, January 03, 2002 12:00 AM

          F     Thursday, January 03, 2002 12:00:00 AM
                dddd, MMMM dd, yyyy h:mm:ss tt (FullDateTimePattern)

          g     1/3/2002 12:00 AM

          G     1/3/2002 12:00:00 AM

          m     January 03
                MMMM dd (MonthDayPattern)

          M     January 03
                MMMM dd (MonthDayPattern)

          r     Thu, 03 Jan 2002 00:00:00 GMT
                ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern)

          R     Thu, 03 Jan 2002 00:00:00 GMT
                ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern)

          s     2002-01-03T00:00:00
                yyyy'-'MM'-'dd'T'HH':'mm':'ss (SortableDateTimePattern)

          t     12:00 AM
                h:mm tt (ShortTimePattern)

          T     12:00:00 AM
                h:mm:ss tt (LongTimePattern)

          u     2002-01-03 00:00:00Z
                yyyy'-'MM'-'dd HH':'mm':'ss'Z' (UniversalSortableDateTimePattern)

          U     Thursday, January 03, 2002 8:00:00 AM

          y     January, 2002
                MMMM, yyyy (YearMonthPattern)

          Y     January, 2002
                MMMM, yyyy (YearMonthPattern)
        */


        }
        #endregion
        //七.获得本周的周六和周日
        //ConvertDateToWeek
        #region ConvertDateToWeek
        public static void ConvertDateToWeek(DateTime date, out DateTime firstdate, out DateTime lastdate)
        {
            DateTime first = System.DateTime.Now;
            DateTime last = System.DateTime.Now;
            switch (date.DayOfWeek)
            {
                case System.DayOfWeek.Monday:
                    first = date.AddDays(-1);
                    last = date.AddDays(5);
                    break;
                case System.DayOfWeek.Tuesday:
                    first = date.AddDays(-2);
                    last = date.AddDays(4);
                    break;
                case System.DayOfWeek.Wednesday:
                    first = date.AddDays(-3);
                    last = date.AddDays(3);
                    break;
                case System.DayOfWeek.Thursday:
                    first = date.AddDays(-4);
                    last = date.AddDays(2);
                    break;
                case System.DayOfWeek.Friday:
                    first = date.AddDays(-5);
                    last = date.AddDays(1);
                    break;
                case System.DayOfWeek.Saturday:
                    first = date.AddDays(-6);
                    last = date;
                    break;
                case System.DayOfWeek.Sunday:
                    first = date;
                    last = date.AddDays(6);
                    break;
            }
            firstdate = first;
            lastdate = last;
        }
        #endregion

        //调用
        DateTime firstdate = System.DateTime.Now;
        DateTime lastdate = System.DateTime.Now;
        //ConvertDateToWeek(date,out firstdate,out lastdate);
        ////八获得当前日期是该年度的第几周
        //DateTime dt = Convert.ToDateTime("2006-05-01");
        //int weeks = dt.DayOfYear / 7 + 1; 
    }

}